CA1330211C - Nozzle cap - Google Patents
Nozzle capInfo
- Publication number
- CA1330211C CA1330211C CA000556361A CA556361A CA1330211C CA 1330211 C CA1330211 C CA 1330211C CA 000556361 A CA000556361 A CA 000556361A CA 556361 A CA556361 A CA 556361A CA 1330211 C CA1330211 C CA 1330211C
- Authority
- CA
- Canada
- Prior art keywords
- foaming cylinder
- uneven portion
- inner peripheral
- nozzle
- peripheral wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/0005—Components or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
- B05B7/005—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow
- B05B7/0056—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow with disturbing means promoting mixing, e.g. balls, crowns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
- B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
- B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
- B05B11/1042—Components or details
- B05B11/1052—Actuation means
- B05B11/1056—Actuation means comprising rotatable or articulated levers
- B05B11/1057—Triggers, i.e. actuation means consisting of a single lever having one end rotating or pivoting around an axis or a hinge fixedly attached to the container, and another end directly actuated by the user
Landscapes
- Nozzles (AREA)
- Closures For Containers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention is a nozzle cap which has a foaming cylinder arranged on the front face of a nozzle port of a nozzle body, wherein an inner peripheral uneven portion is formed on the inner peripheral wall of the foaming cylinder The uneven portion formed on the inner peripheral wall of the foaming cylinder complicatedly reflects the liquid injected from the nozzle port as compared with a mere cylindrical foaming cylinder to thus efficiently foam the liquid.
The present invention is a nozzle cap which has a foaming cylinder arranged on the front face of a nozzle port of a nozzle body, wherein an inner peripheral uneven portion is formed on the inner peripheral wall of the foaming cylinder The uneven portion formed on the inner peripheral wall of the foaming cylinder complicatedly reflects the liquid injected from the nozzle port as compared with a mere cylindrical foaming cylinder to thus efficiently foam the liquid.
Description
ll /
1330~1~
The invention relates to a nozzle cap rotatably mounted at the end of the injection cylindex for a trigger type liquid dispenser.
Aspects of the prior art and preferred embodiments of the invention will be described with reference to the accompanying drawings, in which:
Figs. l(A) and l(B) are respectively a longitudinal sectional view and end view of one embodiment of a nozzle cap according to the present invention;
Figs. 2 to 7 are longitudinal sectional views of : ~
essential portions of different embodiments having various -peripheral uneven portions; -Fig. 8 is a sectional view of the essential portion of the emboaiment in which the inner peripheral uneven portion is formed~shortly in an axial direction and the inner diameter of the portion is not formed with the uneven portion of the foaming cylinder lS larger than the maximum inner diameter of the uneven portion; - ~ :
Fig. 9 is a sectional view of the essential portion of still another embodiment in which the inner diameter of the portion not formed with the uneven portion of the foaming cylinder is smaller than the minimum inner diameter of the uneven portion;
Fig. 10 is a longitudinàl sectional view of the other embodiment in which a foaming cylinder 7 and a nozzle body 5a are integrally formed; and ~3~21~ ;
Fig. 11 is a schematic view of a conventional trigger type liquid dispenser.
Referring now to Fig. 11, a prior art, trigger type liquid dispenser is operated by actuating a piston 2 several times with a trigger 1 to suck liquid from a container.
Pulling the trigger in this state urges the piston 2 into a pumping chamber to pressurize the interior thereof and open an exhaust valve. The high pressure liquid is injected through an injection cylinder 4 and the nozzle port of a cap --~
5.
The nozzle cap 5 has, a liquid guide fixedly mounted on one end of the injection cylinder 4 and the nozzle body ~ ~
rotatably engaging the end of the liquid guide. The nozzle ~ -body has a nozzle port at the center thereof. The nozzle body can be set to three states, namely "foam", "direct" and "close", i.e., for injecting the liquid in a foamed state, for injecting the liquid in a normal liquid state, for preventing flow of the liquid, depending on the angular position of the nozzle body.
::
The foaming means is in the form of a foaming cylinder arranged on the front face of the nozzle port of the nozzle body. The foaming cylinder is a simple cylinder which does not foam the liquid efficiently.
According to one aspect of the present invention, there is provided: a nozzle cap comprising a nozzle body having a divergent nozzle port and a foaming cylinder attached to a nozzle body to be axially aligned and forward of said divergent nozzle port, said foaming cylinder further `
1330~1~
The invention relates to a nozzle cap rotatably mounted at the end of the injection cylindex for a trigger type liquid dispenser.
Aspects of the prior art and preferred embodiments of the invention will be described with reference to the accompanying drawings, in which:
Figs. l(A) and l(B) are respectively a longitudinal sectional view and end view of one embodiment of a nozzle cap according to the present invention;
Figs. 2 to 7 are longitudinal sectional views of : ~
essential portions of different embodiments having various -peripheral uneven portions; -Fig. 8 is a sectional view of the essential portion of the emboaiment in which the inner peripheral uneven portion is formed~shortly in an axial direction and the inner diameter of the portion is not formed with the uneven portion of the foaming cylinder lS larger than the maximum inner diameter of the uneven portion; - ~ :
Fig. 9 is a sectional view of the essential portion of still another embodiment in which the inner diameter of the portion not formed with the uneven portion of the foaming cylinder is smaller than the minimum inner diameter of the uneven portion;
Fig. 10 is a longitudinàl sectional view of the other embodiment in which a foaming cylinder 7 and a nozzle body 5a are integrally formed; and ~3~21~ ;
Fig. 11 is a schematic view of a conventional trigger type liquid dispenser.
Referring now to Fig. 11, a prior art, trigger type liquid dispenser is operated by actuating a piston 2 several times with a trigger 1 to suck liquid from a container.
Pulling the trigger in this state urges the piston 2 into a pumping chamber to pressurize the interior thereof and open an exhaust valve. The high pressure liquid is injected through an injection cylinder 4 and the nozzle port of a cap --~
5.
The nozzle cap 5 has, a liquid guide fixedly mounted on one end of the injection cylinder 4 and the nozzle body ~ ~
rotatably engaging the end of the liquid guide. The nozzle ~ -body has a nozzle port at the center thereof. The nozzle body can be set to three states, namely "foam", "direct" and "close", i.e., for injecting the liquid in a foamed state, for injecting the liquid in a normal liquid state, for preventing flow of the liquid, depending on the angular position of the nozzle body.
::
The foaming means is in the form of a foaming cylinder arranged on the front face of the nozzle port of the nozzle body. The foaming cylinder is a simple cylinder which does not foam the liquid efficiently.
According to one aspect of the present invention, there is provided: a nozzle cap comprising a nozzle body having a divergent nozzle port and a foaming cylinder attached to a nozzle body to be axially aligned and forward of said divergent nozzle port, said foaming cylinder further `
2 ~
' :
~330211 comprising an inner peripheral uneven portion formed on an inner peripheral wall of said foaming cylinder having a substantially uniform cross-sectional opening and an inner peripheral even portion defined by said inner peripheral wall of said foaming cylinder having a substantially uniform cross-sectional opening, said inner peripheral uneven portion of said foaming cylinder is adjacent to said divergent nozzle port so that liquid injected from the divergent nozzle port is dispersed outwardly and directly impinges on the adjacent uneven portion.
One aspect of the invention provides a nozzle cap comprising a foaming cylinder 7 arranged on the front face of the nozzle port 6 of a nozzle body 5a, wherein an inner peripheral uneven portion 8 is formed on the inner peripheral wall of the foaming cylinder 7.
The foaming cylinder 7 causes in~ected liquid to be reflected onto the inner peripheral wall and thus air in the liquid to foam the liquid. The inner peripheral uneven portion 8 is formed on the inner peripheral wall of the foaming cylinder 7 to reflect the injected liquid from the ;-~
nozzle port 6 by the inner peripheral uneven portion 8.
Unlike the prior art cylindrical foaming cylinder, which has smooth inner peripheral surface, this results in a more efficient foaming of the liquid.
In preferred embodiments of this aspect, the invention provides~
`-~ 3 ~ ~
: , . -: . - . : - - , .: . . - , 133~2~1 The above nozzle cap, wherein said uneven portion is formed by spirally projecting a projecting strip on the inner peripheral wall of said foaming cylinder.
, :
The above nozzle cap, wherein said uneven portion is formed by spirally recessing a groove on the inner peripheral wall of said foaming cylinder.
The above nozzle cap, wherein said uneven portion is -~
formed by peripherally projecting a plurality of ring-like ~ -projecting strips on the inner peripheral wall of said foaming cylinder.
The above nozzle cap, wherein said uneven portion is formed by peripherally recessing a plurality of ring-like grooves on the inner peripheral wall of said foaming cylinder. `
The above nozzle cap, wherein said uneven portion is formed by projecting a plurality of projections on the inner peripheral wall of said foaming cylinder.
, , ~ , The above nozzle cap, wherein said uneven portion is ~ -formed by a plurality of recesses on the inner peripheral wall of said foaming cylinder.
, ;'':~. '' The above nozzle cap, wherein said uneven portion is formed by forming small projections of a triangular projecting shape at predetermined peripheral intervals on a circumferential plane of the inner peripheral wall of said foaming cylinder~ ~`
The above nozzle cap, wherein when low viscosity liquid 3a ` '' A~
is injected, said uneven portion is formed on the inner wall nearest said divergent the nozzle port in an axial direction of said foaming cylinder and the length of said uneven portion is less than half the length of said ~oaming cylinder.
The above nozzle cap, wherein ~hen a low viscosity liquid is the material to be foamed, the inner cross- -sectional opening of said even portion of said foaming cylinder is larger than the maximum inner cross-sectional opening of said uneven portion.
The above nozzle cap, wherein when high viscosity liquid is injected, the uneven portion is formed over a substantial portion of the length of said foaming cylinder in an axial direction of said foaming cylinder~
~ ' The above nozzle cap, wherein said nozzle body and said foaming cylinder are formed as one integrated part.
The above nozzle cap, wherein a high viscosity liquid is the material to be foamed, the inner cross-sectional opening of said even portion of said foaming cylinder is smaller than the minimum inner cross-sectional opening of said uneven portion.
Embodiments of the present invention will now be described in detail with reference to Figs. 1 to 10 of the s;~
accompanying drawings.
3b , ~;. .., ~, . ,., . .,; . ;. . .. ~
133~211 Referring now to Figs. l(A) and l(B), a first embodiment of a nozzle cap for a trigger type liquid dispenser according to the present invention which show, a nozzle cap ~ comprises a nozzle body 5a and a liquid guide 5b. The liquid guide 5b is engaged fixedly with the end of a liquid injection cylinder 4. The nozzle body 5a has a - substantially triangular shape when reviewed from the front.
A nozzle port 6 is provided in the center of the front face of the nozzle body 5a. The nozzle body 5a is rotatably engaged via a short cylindrical portion 5c with a plug 9 at the end of the liquid quide 5b.
` :;
.
3c ~'~ .
- , .
Figs. l(A) and l(B) show the "foaming" position of the nozzle cap. Shallow longitudinal grooves 10 are formed at a plurality of peripheral positions on the front of the plug 9 of the liquid guide 5b. Longitudinal liquid passages 11 are formed at a plurality of peripheral positions on the inner periphery of an end cylindrical portion 5c and extends from the rear end face thereof. A spin groove 12 is disposed on the rear side face of the nozzle port 6. In the "foaming"
position, the shallow grooves 10 establish communication between the liquid passages 11 and the spin groove 12 so as to inject high pressure liquid through the spin groove 12 and the nozzle port 6 in an atomized state such that it collides against the inner peripheral wall of the foaming cylinder 7, thereby causing the liquid to foam. -When the nozzle body 5a is rotated to the direct position, a deep groove, not shown in the Fig. 1, of the plug 9 establishes communication between the liquid passages 11 directly with the nozzle port 6 so as to inject liquid into the high pressure nozzle directly in a normal liquid state without spin imparted from the nozzle port 6. When the nozzle body 5a is rotated to the "closed" position, the ;
portion not formed with the shallow grooves 10 and the deep groove of the plug 9 is disposed so as to break communication between the liquid passages 11, the nozzle port 6 and the spin groove 12.
~ . .' '~
The foaming cylinder 7 is integrally formed with a large-diameter mounting cylinder 13. The mounting cylinder 13 is engaged fixedly within a peripheral wall 14 projecting toward the front face such that the forming cylinder 7 forms an air gap 13A on the front face of the nozzle port 6 of the , ,~ ) .~
i33021~
nozzle body 5a. The foaming cylinder 7 and the mounting cylinder 13 are integrally mounted by a front end plate. Air intake openings 15 are peripherally disposed in the end plate and communicate with the air gap 13A. The foaming cylinder 7 also has a projecting circumferential strip 16 formed on the outer peripheral surface of the mounting cylinder 13, engagably with an engaging inner circumferential groove 17 formed on the inner peripheral surface of the peripheral wall 14.
'~
An inner peripheral uneven portion 8 extends on the inner peripheral wall of the foaming cylinder 7. Liquid from the nozzle port 6 and the projecting strip is spirally projected onto this uneven portion of the inner wall.
The inner peripheral uneven portion 8 of the foaming cylinder 7 may be formed as an uneven portion on the inner wall of the foaming cylinder 7, and is not limited to the embodiment shown in Fig. 1.
Figs~ 2 to 7 show different examples of inner peripheral uneven portions 8 of the foaming cylinder 7. In the example of Fig. 2, grooves are spirally recessed on the inner peripheral wall of the foaming cylinder 7 to form an uneven portion on the inner peripheral wall. In the example of Fig.
' :
~330211 comprising an inner peripheral uneven portion formed on an inner peripheral wall of said foaming cylinder having a substantially uniform cross-sectional opening and an inner peripheral even portion defined by said inner peripheral wall of said foaming cylinder having a substantially uniform cross-sectional opening, said inner peripheral uneven portion of said foaming cylinder is adjacent to said divergent nozzle port so that liquid injected from the divergent nozzle port is dispersed outwardly and directly impinges on the adjacent uneven portion.
One aspect of the invention provides a nozzle cap comprising a foaming cylinder 7 arranged on the front face of the nozzle port 6 of a nozzle body 5a, wherein an inner peripheral uneven portion 8 is formed on the inner peripheral wall of the foaming cylinder 7.
The foaming cylinder 7 causes in~ected liquid to be reflected onto the inner peripheral wall and thus air in the liquid to foam the liquid. The inner peripheral uneven portion 8 is formed on the inner peripheral wall of the foaming cylinder 7 to reflect the injected liquid from the ;-~
nozzle port 6 by the inner peripheral uneven portion 8.
Unlike the prior art cylindrical foaming cylinder, which has smooth inner peripheral surface, this results in a more efficient foaming of the liquid.
In preferred embodiments of this aspect, the invention provides~
`-~ 3 ~ ~
: , . -: . - . : - - , .: . . - , 133~2~1 The above nozzle cap, wherein said uneven portion is formed by spirally projecting a projecting strip on the inner peripheral wall of said foaming cylinder.
, :
The above nozzle cap, wherein said uneven portion is formed by spirally recessing a groove on the inner peripheral wall of said foaming cylinder.
The above nozzle cap, wherein said uneven portion is -~
formed by peripherally projecting a plurality of ring-like ~ -projecting strips on the inner peripheral wall of said foaming cylinder.
The above nozzle cap, wherein said uneven portion is formed by peripherally recessing a plurality of ring-like grooves on the inner peripheral wall of said foaming cylinder. `
The above nozzle cap, wherein said uneven portion is formed by projecting a plurality of projections on the inner peripheral wall of said foaming cylinder.
, , ~ , The above nozzle cap, wherein said uneven portion is ~ -formed by a plurality of recesses on the inner peripheral wall of said foaming cylinder.
, ;'':~. '' The above nozzle cap, wherein said uneven portion is formed by forming small projections of a triangular projecting shape at predetermined peripheral intervals on a circumferential plane of the inner peripheral wall of said foaming cylinder~ ~`
The above nozzle cap, wherein when low viscosity liquid 3a ` '' A~
is injected, said uneven portion is formed on the inner wall nearest said divergent the nozzle port in an axial direction of said foaming cylinder and the length of said uneven portion is less than half the length of said ~oaming cylinder.
The above nozzle cap, wherein ~hen a low viscosity liquid is the material to be foamed, the inner cross- -sectional opening of said even portion of said foaming cylinder is larger than the maximum inner cross-sectional opening of said uneven portion.
The above nozzle cap, wherein when high viscosity liquid is injected, the uneven portion is formed over a substantial portion of the length of said foaming cylinder in an axial direction of said foaming cylinder~
~ ' The above nozzle cap, wherein said nozzle body and said foaming cylinder are formed as one integrated part.
The above nozzle cap, wherein a high viscosity liquid is the material to be foamed, the inner cross-sectional opening of said even portion of said foaming cylinder is smaller than the minimum inner cross-sectional opening of said uneven portion.
Embodiments of the present invention will now be described in detail with reference to Figs. 1 to 10 of the s;~
accompanying drawings.
3b , ~;. .., ~, . ,., . .,; . ;. . .. ~
133~211 Referring now to Figs. l(A) and l(B), a first embodiment of a nozzle cap for a trigger type liquid dispenser according to the present invention which show, a nozzle cap ~ comprises a nozzle body 5a and a liquid guide 5b. The liquid guide 5b is engaged fixedly with the end of a liquid injection cylinder 4. The nozzle body 5a has a - substantially triangular shape when reviewed from the front.
A nozzle port 6 is provided in the center of the front face of the nozzle body 5a. The nozzle body 5a is rotatably engaged via a short cylindrical portion 5c with a plug 9 at the end of the liquid quide 5b.
` :;
.
3c ~'~ .
- , .
Figs. l(A) and l(B) show the "foaming" position of the nozzle cap. Shallow longitudinal grooves 10 are formed at a plurality of peripheral positions on the front of the plug 9 of the liquid guide 5b. Longitudinal liquid passages 11 are formed at a plurality of peripheral positions on the inner periphery of an end cylindrical portion 5c and extends from the rear end face thereof. A spin groove 12 is disposed on the rear side face of the nozzle port 6. In the "foaming"
position, the shallow grooves 10 establish communication between the liquid passages 11 and the spin groove 12 so as to inject high pressure liquid through the spin groove 12 and the nozzle port 6 in an atomized state such that it collides against the inner peripheral wall of the foaming cylinder 7, thereby causing the liquid to foam. -When the nozzle body 5a is rotated to the direct position, a deep groove, not shown in the Fig. 1, of the plug 9 establishes communication between the liquid passages 11 directly with the nozzle port 6 so as to inject liquid into the high pressure nozzle directly in a normal liquid state without spin imparted from the nozzle port 6. When the nozzle body 5a is rotated to the "closed" position, the ;
portion not formed with the shallow grooves 10 and the deep groove of the plug 9 is disposed so as to break communication between the liquid passages 11, the nozzle port 6 and the spin groove 12.
~ . .' '~
The foaming cylinder 7 is integrally formed with a large-diameter mounting cylinder 13. The mounting cylinder 13 is engaged fixedly within a peripheral wall 14 projecting toward the front face such that the forming cylinder 7 forms an air gap 13A on the front face of the nozzle port 6 of the , ,~ ) .~
i33021~
nozzle body 5a. The foaming cylinder 7 and the mounting cylinder 13 are integrally mounted by a front end plate. Air intake openings 15 are peripherally disposed in the end plate and communicate with the air gap 13A. The foaming cylinder 7 also has a projecting circumferential strip 16 formed on the outer peripheral surface of the mounting cylinder 13, engagably with an engaging inner circumferential groove 17 formed on the inner peripheral surface of the peripheral wall 14.
'~
An inner peripheral uneven portion 8 extends on the inner peripheral wall of the foaming cylinder 7. Liquid from the nozzle port 6 and the projecting strip is spirally projected onto this uneven portion of the inner wall.
The inner peripheral uneven portion 8 of the foaming cylinder 7 may be formed as an uneven portion on the inner wall of the foaming cylinder 7, and is not limited to the embodiment shown in Fig. 1.
Figs~ 2 to 7 show different examples of inner peripheral uneven portions 8 of the foaming cylinder 7. In the example of Fig. 2, grooves are spirally recessed on the inner peripheral wall of the foaming cylinder 7 to form an uneven portion on the inner peripheral wall. In the example of Fig.
3, a plurality of ring-like projecting strips 8A are peripherally projected on the inner peripheral wall of the foaming cylinder 7 to form an uneven portion on the inner peripheral wall. In the example of Fig. 4, a plurality of ring-like peripheral grooves 8B are peripherally recessed on the inner peripheral wall of the foaming cylinder 7 to form an uneven portion in the inner peripheral wall. In the .
¢ ' ' :~
example of Fig 5, a plurality of projections 8C are pro~ected on the inner peripheral wall of the foaming cylinder 7 to form an uneven portion on the inner peripheral wall. In the example of Fig. 6, a plurality of pores 8D are recessed on the inner peripheral wa:Ll of the foaming cylinder 7 to form an uneven portion on the :inner peripheral wall. In the example of Fig. 7, small projections 8E of triangular shape are formed at predetermined c:ircumferential intervals on the inner peripheral wall of the foaming cylinder 7 to ~0 form an uneven portion on the inner perîpheral wall.
.'- - ~
When the nozzle body 5a is set to the "foaming" ~- - -position, an angle for diffusing liquid in the atomized state injected from the nozzle port 6 depends on the viscosity of the liquid to be injected. Therefore, the formation of the uneven portion 8 is preferably determined by the viscosity of the liquid to be injected.
In case of low viscosity liquid, the liquid is dispersed over a wide angle from the nozzle port 6. Thus, the injected liquid in the atomized state is diffused at the position near the nozzle port 6 axially as compared with the case of high viscosity liquid. Accordingly, when the foaming cylinders, which have the uneven portions of the same shape, are employed, the low viscosity liquid that contacts the uneven portion 8 tends to form a peripheral layer near the nozzle port 6 on the inner peripheral wall of the foaming cylinder 7 as compared with that of the high ~3~2~1 viscosity liquid. Thus, in the case of low viscosity liquid, as shown in Fig. 8, it is desirable to form the uneven portion 8 shorter and nearer to the nozzle port 6 axially as compared with the case of high viscosity liquid. When the uneven portion 8 is formed too long in the axial direction in ~ -the foaming cylinder 7, the resistance of the uneven portion 8 against the liquid injected from the nozzle port 6 is -increased so that the injecting pressure of the liquid injected from an injection port 18 decreases. For example, as shown in Fig. 8, the uneven portion 8 is formed on the portion near the side of the nozzle port 6 from the center of `~ -~
the inner peripheral wall of the foaming cylinder 7. When the foamability is good and the viscosity of the liquid is low, foaming is performed efficiently even if the uneven portion 8 is formed shorter in the axial direction of the foaming cylinder 7.
- On the other hand, in case of high viscosity liquid, theliquid is diffused and injected in a relatively narrow angle from the nozzle port 6 as compared with the case of low viscosity liquid. Thus, it is preferable to form the uneven portion 8 longer in the axial direction farther from the nozzle port 6.
Further, in order to reduce the resistance of the foaming cylinder 7 against the injected liquid in case of low 25~ viscosity liquid, as shown in Fig. 8, the inner diameter of the portion 7a formed with no uneven portion 8 of the forming cylinder 7 may be made larger than the maximum inner diameter of the uneven portion 8. Thus, such a configuration prevents the resistance of the inner wall portion 7a of the foaming 13302~
cylinder 7 not formed with the uneven portion 8 from increasing so that the injecting pressure of the liquid from the injection port 18 increases. Also, the atomizing pattern can be varied.
In the case of high viscosity liquid, as shown in Fig.
9, the inner diameter of the portion 7a not formed with the uneven portion 8 of the foaming cylinder 7 may be made smaller than the minimum inner diam,eter of the uneven portion 8. However, when the inner diameter of the portion 7a is -~-~S
excessively reduced, the resistance increases excessively to cause the injecting pressure of the liquid to decrease, thereby permitting the liquid to leak and drop from the injection port.
The uneven portion 8 of the inner peripheral wall of the foaming cylinder 7 is formed mainly on the rear half portion near the nozzle port 6 on the inner peripheral wall of the foaming cylinder 7, and it is pxeferable not to form the uneven portion 8 on the entire inner peripheral wall of the foaming cylinder 7. If the uneven portion 8 is formed on the entire inner peripheral wall of the foaming cylinder 7, the resistance against the injected liquid by the uneven portion 8 is excessively increased, resulting in a reduction of the injection pressure of the liquid. The axial length of the uneven portion 8 on the inner peripheral surface depends upon the viscosity of the liquid.
In the embodiments described above, the foaming cylinder :, :,::
7 is formed independently from the nozzle body 5a. However, the foaming cylinder 7 may be formed integrally with the ;
nozzle body Sa. Fig. 10 shows the example of this case. A
~
.': ' .: ' 8 ~-' '~; ' ' ' ' ' ' " ". ' ': ' ' ' . ~ ' . ' .' .. .. . ' . . " ' '"' ' . ; ' ' ?' ~
13302~1 ~
foaming cylinder 7 is projected integrally from the front wall of the outer periphery of the nozzle port. When the foaming cylinder 7 is integrally formed with the nozzle body 5a, if an air intake port 15 is formed on the front ace of ~ , the nozzle cap, it cannot be removed from a mold after '' molding it in a casting mold. Therefore, in the embodiment of Fig. 10, an air intake port 15 is formed on the side of ~ ~
the nozzle cap. "
The respective portions are molded of synthetic resin material. ' According to,the present invention as described above, the uneven portion 8 is formed on the inner peripheral wall ~'~
of the foaming cylinder 7 so that the injecting liquid from ' the nozzle port 6 is multiply reflected by the uneven portion 8, resulting in a nozzle cap having a high foaming ; effi~iency.
, ", .
' : ' ~:'
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example of Fig 5, a plurality of projections 8C are pro~ected on the inner peripheral wall of the foaming cylinder 7 to form an uneven portion on the inner peripheral wall. In the example of Fig. 6, a plurality of pores 8D are recessed on the inner peripheral wa:Ll of the foaming cylinder 7 to form an uneven portion on the :inner peripheral wall. In the example of Fig. 7, small projections 8E of triangular shape are formed at predetermined c:ircumferential intervals on the inner peripheral wall of the foaming cylinder 7 to ~0 form an uneven portion on the inner perîpheral wall.
.'- - ~
When the nozzle body 5a is set to the "foaming" ~- - -position, an angle for diffusing liquid in the atomized state injected from the nozzle port 6 depends on the viscosity of the liquid to be injected. Therefore, the formation of the uneven portion 8 is preferably determined by the viscosity of the liquid to be injected.
In case of low viscosity liquid, the liquid is dispersed over a wide angle from the nozzle port 6. Thus, the injected liquid in the atomized state is diffused at the position near the nozzle port 6 axially as compared with the case of high viscosity liquid. Accordingly, when the foaming cylinders, which have the uneven portions of the same shape, are employed, the low viscosity liquid that contacts the uneven portion 8 tends to form a peripheral layer near the nozzle port 6 on the inner peripheral wall of the foaming cylinder 7 as compared with that of the high ~3~2~1 viscosity liquid. Thus, in the case of low viscosity liquid, as shown in Fig. 8, it is desirable to form the uneven portion 8 shorter and nearer to the nozzle port 6 axially as compared with the case of high viscosity liquid. When the uneven portion 8 is formed too long in the axial direction in ~ -the foaming cylinder 7, the resistance of the uneven portion 8 against the liquid injected from the nozzle port 6 is -increased so that the injecting pressure of the liquid injected from an injection port 18 decreases. For example, as shown in Fig. 8, the uneven portion 8 is formed on the portion near the side of the nozzle port 6 from the center of `~ -~
the inner peripheral wall of the foaming cylinder 7. When the foamability is good and the viscosity of the liquid is low, foaming is performed efficiently even if the uneven portion 8 is formed shorter in the axial direction of the foaming cylinder 7.
- On the other hand, in case of high viscosity liquid, theliquid is diffused and injected in a relatively narrow angle from the nozzle port 6 as compared with the case of low viscosity liquid. Thus, it is preferable to form the uneven portion 8 longer in the axial direction farther from the nozzle port 6.
Further, in order to reduce the resistance of the foaming cylinder 7 against the injected liquid in case of low 25~ viscosity liquid, as shown in Fig. 8, the inner diameter of the portion 7a formed with no uneven portion 8 of the forming cylinder 7 may be made larger than the maximum inner diameter of the uneven portion 8. Thus, such a configuration prevents the resistance of the inner wall portion 7a of the foaming 13302~
cylinder 7 not formed with the uneven portion 8 from increasing so that the injecting pressure of the liquid from the injection port 18 increases. Also, the atomizing pattern can be varied.
In the case of high viscosity liquid, as shown in Fig.
9, the inner diameter of the portion 7a not formed with the uneven portion 8 of the foaming cylinder 7 may be made smaller than the minimum inner diam,eter of the uneven portion 8. However, when the inner diameter of the portion 7a is -~-~S
excessively reduced, the resistance increases excessively to cause the injecting pressure of the liquid to decrease, thereby permitting the liquid to leak and drop from the injection port.
The uneven portion 8 of the inner peripheral wall of the foaming cylinder 7 is formed mainly on the rear half portion near the nozzle port 6 on the inner peripheral wall of the foaming cylinder 7, and it is pxeferable not to form the uneven portion 8 on the entire inner peripheral wall of the foaming cylinder 7. If the uneven portion 8 is formed on the entire inner peripheral wall of the foaming cylinder 7, the resistance against the injected liquid by the uneven portion 8 is excessively increased, resulting in a reduction of the injection pressure of the liquid. The axial length of the uneven portion 8 on the inner peripheral surface depends upon the viscosity of the liquid.
In the embodiments described above, the foaming cylinder :, :,::
7 is formed independently from the nozzle body 5a. However, the foaming cylinder 7 may be formed integrally with the ;
nozzle body Sa. Fig. 10 shows the example of this case. A
~
.': ' .: ' 8 ~-' '~; ' ' ' ' ' ' " ". ' ': ' ' ' . ~ ' . ' .' .. .. . ' . . " ' '"' ' . ; ' ' ?' ~
13302~1 ~
foaming cylinder 7 is projected integrally from the front wall of the outer periphery of the nozzle port. When the foaming cylinder 7 is integrally formed with the nozzle body 5a, if an air intake port 15 is formed on the front ace of ~ , the nozzle cap, it cannot be removed from a mold after '' molding it in a casting mold. Therefore, in the embodiment of Fig. 10, an air intake port 15 is formed on the side of ~ ~
the nozzle cap. "
The respective portions are molded of synthetic resin material. ' According to,the present invention as described above, the uneven portion 8 is formed on the inner peripheral wall ~'~
of the foaming cylinder 7 so that the injecting liquid from ' the nozzle port 6 is multiply reflected by the uneven portion 8, resulting in a nozzle cap having a high foaming ; effi~iency.
, ", .
' : ' ~:'
Claims (13)
1. A nozzle cap comprising a nozzle body having a divergent nozzle port and a foaming cylinder attached to a nozzle body to be axially aligned and forward of said divergent nozzle port, said foaming cylinder further comprising an inner peripheral uneven portion formed on an inner peripheral wall of said foaming cylinder having a substantially uniform cross-sectional opening and an inner peripheral even portion defined by said inner peripheral wall of said foaming cylinder having a substantially uniform cross-sectional opening, said inner peripheral uneven portion of said foaming cylinder is adjacent to said divergent nozzle port so that liquid injected from the divergent nozzle port is dispersed outwardly and directly impinges on the adjacent uneven portion.
2. The nozzle cap according to claim 1, wherein said uneven portion is formed by spirally projecting a projecting strip on the inner peripheral wall of said foaming cylinder.
3. The nozzle cap according to claim 1, wherein said uneven, portion is formed by spirally recessing a groove on the inner peripheral wall of said foaming cylinder.
4. The nozzle cap according to claim 1, wherein said uneven portion is formed by peripherally projecting a plurality of ring-like projecting strips on the inner peripheral wall of said foaming cylinder.
5. The nozzle cap according to claim 1, wherein said uneven portion is formed by peripherally recessing a plurality of ring-like grooves on the inner peripheral wall of said foaming cylinder.
6. The nozzle cap according to claim 1, wherein said uneven portion is formed by projecting a plurality of projections on the inner peripheral wall of said foaming cylinder.
7. The nozzle cap according to claim 1, wherein said uneven portion is formed by a plurality of recesses on the inner peripheral wall of said foaming cylinder.
8. The nozzle cap according to claim 1,wherein said uneven portion is formed by forming small projections of a triangular projecting shape at predetermined peripheral intervals on a circumferential plane of the inner peripheral wall of said foaming cylinder.
9. The nozzle cap according to claim 1, wherein when low viscosity liquid is injected, said uneven portion is formed on the inner wall nearest said divergent the nozzle port in an axial direction of said foaming cylinder and the length of said uneven portion is less than half the length of said foaming cylinder.
10. The nozzle cap according to claim 1, wherein when a low viscosity liquid is the material to be foamed, the inner cross-sectional opening of said even portion of said foaming cylinder is larger than the maximum inner crosssectional opening of said uneven portion.
11 11. The nozzle cap according to claim 1, wherein when high viscosity liquid is injected, the uneven portion is formed over a substantial portion of the length of said foaming cylinder in an axial direction of said foaming cylinder.
12. The nozzle cap according to claim 1, wherein said nozzle body and said foaming cylinder are formed as one integrated part.
13. The nozzle cap according to claim 1, wherein when a high viscosity liquid is the material to be foamed, the inner cross-sectional opening of said even portion of said foaming cylinder is smaller than the minimum inner cross-sectional opening of said uneven portion.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP87311456A EP0322488B1 (en) | 1987-12-24 | 1987-12-24 | Nozzle cap |
| DE8787311456T DE3785454T2 (en) | 1987-12-24 | 1987-12-24 | NOZZLE CAP. |
| AU83099/87A AU606640B2 (en) | 1987-12-24 | 1987-12-29 | Nozzle cap |
| CA000556361A CA1330211C (en) | 1987-12-24 | 1988-01-12 | Nozzle cap |
| US07/372,112 US4971252A (en) | 1987-12-24 | 1989-06-28 | Nozzle cap |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP87311456A EP0322488B1 (en) | 1987-12-24 | 1987-12-24 | Nozzle cap |
| CA000556361A CA1330211C (en) | 1987-12-24 | 1988-01-12 | Nozzle cap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1330211C true CA1330211C (en) | 1994-06-14 |
Family
ID=25671660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000556361A Expired - Fee Related CA1330211C (en) | 1987-12-24 | 1988-01-12 | Nozzle cap |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0322488B1 (en) |
| AU (1) | AU606640B2 (en) |
| CA (1) | CA1330211C (en) |
| DE (1) | DE3785454T2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2660289B1 (en) * | 1990-04-03 | 1992-07-17 | Oreal | PUSH BUTTON FOR AEROSOL CAN, AND AEROSOL BOTTLE EQUIPPED WITH SUCH A PUSH BUTTON. |
| US5234166A (en) * | 1990-10-25 | 1993-08-10 | Contico International, Inc. | Spinner assembly for a sprayer |
| FR2711930B1 (en) * | 1993-11-03 | 1996-01-26 | Sofab | Spraying device. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4598862A (en) * | 1983-05-31 | 1986-07-08 | The Dow Chemical Company | Foam generating device and process |
| DE8434459U1 (en) * | 1984-11-24 | 1986-04-03 | Zeller Plastik Koehn, Graebner & Co, 5583 Zell | Foam generator |
| US4730775A (en) * | 1986-01-10 | 1988-03-15 | Afa Division Of Waynesboro Textiles, Inc. | Two piece foamer nozzle assembly |
-
1987
- 1987-12-24 DE DE8787311456T patent/DE3785454T2/en not_active Expired - Lifetime
- 1987-12-24 EP EP87311456A patent/EP0322488B1/en not_active Expired - Lifetime
- 1987-12-29 AU AU83099/87A patent/AU606640B2/en not_active Ceased
-
1988
- 1988-01-12 CA CA000556361A patent/CA1330211C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| AU606640B2 (en) | 1991-02-14 |
| EP0322488B1 (en) | 1993-04-14 |
| AU8309987A (en) | 1989-07-20 |
| DE3785454T2 (en) | 1993-07-29 |
| EP0322488A1 (en) | 1989-07-05 |
| DE3785454D1 (en) | 1993-05-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |